51670404 has 18 divisors (see below), whose sum is σ = 130611390. Its totient is φ = 17223456.

The previous prime is 51670393. The next prime is 51670417. The reversal of 51670404 is 40407615.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 9290304 = 6510^2 + 3048^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 717609 + ... + 717680.

Almost surely, 2^51670404 is an apocalyptic number.

It is an amenable number.

51670404 is an abundant number, since it is smaller than the sum of its proper divisors (78940986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51670404 is a wasteful number, since it uses less digits than its factorization.

51670404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435299 (or 1435294 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 51670404 is about 7188.2128516064. The cubic root of 51670404 is about 372.4608405902.

The spelling of 51670404 in words is "fifty-one million, six hundred seventy thousand, four hundred four".